Is it expected behavior to not be able to open a .tif in the Star recomposition tool?
Probably yes.
Need to check however but it is the same in PixelMath
Ok thanks let me know. I usually like to export out and do final touch-ups in Photoshop. Would be cool to bring it back in and do the recomposition in Siril. I suppose I could open the tif and save it back to a fit for recomposition?